Malicious PDF — malware analysis report

Static analysis result for SHA-256 131f0defb10ba3f8…

MALICIOUS

PDF

40.4 KB Created: 2020-11-05 20:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 47d5244b19cc3446849653d544d2e1e4 SHA-1: c4601330c43198014c3b9e220d2bc34a25a940fb SHA-256: 131f0defb10ba3f8a5b94a2408a63ef27d7f42967dc90e7582d8f24631f43798
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/aws?keyword=asco+2020+meeting+chicago In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_5f8c812a88279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5f9ecce555b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411246/normal_5f9e67d49f08e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f912dda28558.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/satijabal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5fa0582700f90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/088a4a46-7480-4733-a6b9-5e910bc6b097/team_sonic_racing_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a29756ce-0fdd-4c28-8873-1c25f383bca7/how_to_add_mods_to_battlefront_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0506939-12f4-4402-8156-63080ff3cb0d/mitonaxukunulunerapazimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d63e81-0376-44b4-8837-94eb79d2049f/roroturovefunefomev.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E06 5348 bytes
SHA-256: 3707e7ea176278b4a7ca8eba149d6fee3f507e780d63951c042ee2ad8bf03645
font_01_sfnt_off00007017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7017 11016 bytes
SHA-256: 1f0a06530855f4332e8b6547035f80e0066a3732482375992c16a113bc5713ab